/Engine/Source/Runtime/MovieSceneTracks/Public/Sections/MovieSceneStringSection.h
Optional user-implementation function for populating an evaluation entity field
virtual bool PopulateEvaluationFieldImpl ( const [TRange](API\Runtime\Core\Math\TRange)< [FFrameNumber](API\Runtime\Core\Misc\FFrameNumber) > & EffectiveRange, const [FMovieSceneEvaluationFieldEntityMetaData](API\Runtime\MovieScene\Evaluation\FMovieSceneEvaluationFieldEntity-_2) & InMetaData, [FMovieSceneEntityComponentFieldBuilder](API\Runtime\MovieScene\Evaluation\FMovieSceneEntityComponentFieldB-) * OutFieldBuilder )